AP Biology Unit 2 Review

Front

What is the function of the plasma membrane?

Back

The plasma membrane controls exchange between the cell and the external environment.

Front

What are the three types of passive transport?

Back

Osmosis, Diffusion, Facilitated diffusion.

Front

Why are cells microscopically small?

Back

Cells are small because they want to maximize their surface area-to-volume ratio.

Front

What is the significance of the surface area-to-volume ratio in cells?

Back

A higher surface area-to-volume ratio enables more effective exchange of materials via the cell membrane.

Front

Where are ribosomes primarily found in a cell?

Back

Ribosomes are found in the cytoplasm and on the rough endoplasmic reticulum (Rough ER).

Front

What is osmosis?

Back

Osmosis is the passive transport of water across a selectively permeable membrane.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a membrane via protein channels without energy.

Front

What role do transport proteins play in passive transport?

Back

Transport proteins assist in the movement of substances across the cell membrane without the use of energy.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from the external environment.